Wearing part for crushers



Dec. 24, 1940.

O. C. GRUENDER WEARING PART FOR CRUSHERS Filed Nov. 50, 1958 ar rae/24762' fiar/eey;

Patented Dec. 24, 1940 UNITED STATES 2,226,341 WEARING PART Fon omJsHERs Oscar C. Gruender, Milwaukee, WiS., assignor to Nordberg Manufacturing Company, Milwaukee, Wis., a corporationrof Wisconsin Application November so, 193s, serial No. 243,094

2 Claims.

My invention relates to'an improvement in wearing parts for Crushers and has particular applicability to a bowl liner for crushers in which a crushing head is gyrated or otherwise moved 5 within a concave bowl.

One purpose is the provision of a bowl liner which shall have a maximum' resistance to distortion.

Another purpose is the provision of means for preventing distortion or bending of the crusher bowl or frame surroundingk the bowl liner.

Another purpose is the provision of improved means for mounting the bowl liner in a bowl.

Other purposes will appear from time to time in the course of the specification and claims.

I illustrate my invention more or less diagrammatically in the accompanying drawing which is a vertical axial view taken on a plane including the general vertical axis of the crusher.

Like parts are indicated by like characters throughout the specification and drawing.

Referring to the drawing, I generally indicates a crusher frame including a central fixed bearing sleeve 2 in which is rotatably mounted the sleeve 3, eccentrically apertured as at 4. It may be rotated for example through the gear 5 at the top of 'the sleeve which meshes with the pinion 5 on a drive shaft 'I which may be driven from any suitable source of power not herein shown. 8 is a supporting bearing member having an upper concave bearing surface 9 adapted to receive the corresponding downwardly convex spherical bearing surface IU of a crusher head I I. I2 is a shaft to which the crusher head is secured, which shaft extends downwardly into the eccentric aperture 4.

I3 is any suitable mantle or wear taking part upon the head I0. The parts above described do not of themselves form part of the present invention but are described and shown as illustrating a structure to which my invention may be applied. I4 indicates a bowl structure suitably mounted upon the frame I and held in the position in which it is shown, for example, by the springs I5. The bowl structure' includes an inverted bowl member or wall IB which is apertured as at I1 and provided with an upwardly and outwardly inclined bottom surface I8, the purpose of which will later appear.

I9 generally indicates a bowl liner structure having a generally conic rear face 20 and a forward or inner crushing face 2I of any suitable contour. It is thickened at the bottom as at 22, this thickened portion being provided with a surface 23 conforming to the opposed surface I8 of the bowl structure I4. 24 indicates a securing lug adapted to lextend Lupwardly and inwardly through the aperture II to receive any suitable locking means, for example the U-bolt 25. Y It will be understood that kany suitable number of `lugs 24 and U-bolts 25 may be employed, whereby the 5 entire bowl liner structure I9 is firmly upwardly drawn against the opposed inner surface 21 of the inverted bowl member I6.

26 indicates a layer of zinc or the like which is interposed between the inner face 20 of the: liner I9 and the opposed conic face 21 of the bowl. It will be noted, however, that the surface 23 of the member'l maintains a metal to metal vcontact with the opposed surface I8 of the bowl I6. f g

It will be realized that whereas I have described and illustrated a practical and operative device, nevertheless many changes may be made in the size, shape, number and disposition of parts without departing from the spirit of my invention. I therefore wish my description and drawing to be taken as in abroad sense illustrative or diagrammatic, rather than as limitingl me to my precise showing.

Where I employ in the claims such terms as,25

soft metal,packing, or thelike, it will be understood that I intend that term to be limited to the employment of highly ductile or soft metals, such as zinc, lead, Babbitt metal, or the like, which are commonly employed as packings in gyratory Crushers and which run or ow under pressure much more readily than do such metals as cast iron or the like.

The use and operation of my invention are as follows:

In crushing practice, it is frequent to employ wearing parts of manganese steel or other metals or alloys which are likely to expand or peen under heavy use. Manganese steel, for example, is exceedingly satisfactory in its wearing qualities but it does become deformed under use. One purpose of my invention is to provide a bowl liner for a crusher in which the tendency of the part tov deform or run isl reduced to a minimum or is directed in such fashion as to prevent splitting of the liner itself or the subjection of the bowl to` undue and deforming stresses.

I find it desirable, for example, to employ the upwardly and outwardly extending portion 23 as a species of lateral lock to distribute the thrust 50 and to prevent lateral displacement of the liner. When the liner is in the position shown ln the drawing, with the U-bolts 25 drawing the lugs 24 upwardly, the entire liner is upwardly rmly held. 'I'he conic face 20 of the liner abuts against 55 checked, the forces tending to balance. In this sense, the tight direct joint at 23 at the bottomV of the bowl supports the casting in which the bowl is formed, and prevents an outward bowing of the casting. 1

A further advantage is the provision ofv a tight connection between the opposed parts which,v after the zinc has been poured into the space between the bowl and liner, holds the part tight until the zinc and the opposed metallic faces assume a permanent seat. This `initial period may extend vfor a week or more. The only metal to metal contact, in the sense of a thrust of opposed hard metal surfaces against each other, is along the face 23, since the zinc acts in a sense as a cushion for the bond. v

The toe-in connection at 23 prevents the bowl liner at the opposite side from drawing away from the bowl in responseto the Ycrushing action at the closed side of the device.

As the metal-in the liner ows under severe service, it has a tendency to become loose. The extension 22 at the lower end of the liner resists movement of the bowl liner as a whole from the position which it assumes as it is pulled upward against the surface I8 of the .cr-usher bowl. The position assumed by the lcone in the drawing is that in which crushing occurs at the left of the crushing cavity. The cone liner, therefore, is thrust toward the leftand would normally be resisted by the `zinc ybacking of the liner only. However, by Virtue of the fact that thefliner will tend to move toward the left, it will clamp itself I claim:

1. In combination in a gyratory crusher, a bowl having a generally conic upwardly and inwardly extending face and a generally conic upwardly and outwardly extending face, the two faces converging toward their lower edges, and a bowl liner of a metal having the general characteristics of manganese steel, said liner having a generally conic upwardly and inwardly extending face opposed to thecorresponding face of the bowl and a generally conic upwardly and outwardly extending face opposed to and in engagement with the corresponding face of the bowl, a layer of metal .substantially more ductile than the metal of the liner ,extending between and substantially throughout Ythe opposed upwardly and inwardly extending faces of the two members and extending to the lower edges thereof, said opposed faces being-normally entirely out of contact with each other, and securing means for holding the bowl liner upwardly against the bowl, the angle of the upwardly and outwardly inclined conic faces from the horizontal being sufficient to prevent lateral movement in response to crushing stress.

2. For use in a gyratory crusher with a bowl having a generally conic upwardly and inwardly extending face and a generally conic upwardly and outwardly extending face and a layer of highly ductile metal overlying the upwardly and inwardly extending ,face from top to 'bottom thereof, a bowl liner of a metal having the general characteristics of manganese steel, said liner having a generally upwardly and inwardly inclined crushing body having a generally conic inner face and an outward flange at the lower edge of said body extending circumferentially substantially entirely thereabout,said `flange being formed with an upwardly and outwardly inclined generally conic .top Contact surface, ,all parts of which lie in horizontal planes intersecting rthe inner conic face of the crushing body, the angle of said face vfrom the horizontal being sufficient to prevent lateral movement of said liner in response to crushing stresses delivered against the upwardly and inwardly extending conic facel thereof.

OSCAR C. GRUE'NDER. 

